KR19980050247U - I / O port redundancy and mode selector of electronic exchange - Google Patents

Abstract

The present invention relates to an I / O port redundancy and mode selection device of an electronic switch, and in particular, a system that simplifies the structure of the system by implementing a separate I / O port switching connection board and a plurality of cables in the I / O control board. The present invention relates to an input / output port redundancy and mode selection device of an electronic exchange.

Conventionally, a large number of cables and a separate unified port switching access board are necessary to increase the volume and cost of the system, as well as the failure of the cable and the functional error of the port switching access board cause system-wide errors. When the mode was selected, the corresponding port switching connection board had to be powered off, so the input / output function of the system was interrupted.

According to the present invention, a separate input / output port switching connection board and a plurality of cables are removed from the electronic switchboard, and the signal level converting unit transmits the data or the back board of the input / output transmitter according to the control signal of the port switching controller in the redundant input / output control board. By level converting and sending and receiving data through the selected dedicated DCE / DTE mode connector of the system, the system structure can be simplified without using the jumper stick without powering off and there is no cable, so there is no risk of error caused by cable sheathing. It brings the stability and cost savings of the system.

Description

I / O port redundancy and mode selector of electronic exchange

The present invention relates to an I / O port redundancy and mode selection device of an electronic switch, and in particular, a system that simplifies the structure of the system by implementing a separate I / O port switching connection board and a plurality of cables in the I / O control board. The present invention relates to an input / output port redundancy and mode selection device of an electronic exchange.

In general, due to the importance of the operation and maintenance of the electronic switchboard, the I / O control board is composed of redundancy, and if one side is active, the other side is stand-by, and is inactive. It performs the operation and sends and receives messages to and from the operator by the active I / O control board.

In addition, in order to communicate with the electronic switch for the operation and maintenance of the switch, the operator in the electronic switch exchanges a message through an input / output unit. The input / output port redundancy and mode selection device of the electronic switch for the input / output unit is shown in FIG. 1. As shown in Fig. 2, the control boards 10a and 10b, which are composed of redundancy and control input and output of messages on the active side during redundancy, the back board 20 of the corresponding control boards 10a and 10b, Signal level is provided by selecting the cable connection part 30 which has a cable and connects the said control board 10a, 10b and the port switching connection board 40, and the message of the active side applied through the said cable connection part 30. Converts and transmits the signal and converts the message level through the corresponding back board 50 to the corresponding control boards 10a and 10b through the cable connection unit 30. It is made by a back board (50) of the stage as a neutralizing structure of the port switching connection board 40 and the connection board 40 for the switch port.

In addition, the active side of the input / output transmission units 11a and 11b provided on the A side and B side control boards 10a and 10b, respectively, may be connected to the port switching connection board through the back board 20 and the cable connection unit 50. 40) Receiving Receiving Data of A-side (RDA) and Receiving Data of B-side (RDB), which are signals of the converted Transistor Transistor Logic (TTL) level, and receiving Transmitting Data of A-side (TDA) Transmitting Data of B-side (TDB) is transmitted through the back board 20.

The port switching connecting board 40 generates a control signal (CTS) for selecting TDA and TDB applied from the control boards 10a and 10b and applies it to the muxing control unit 42. And a path of the control boards 10a and 10b according to the CTS applied from the corresponding port switching controller 41 to multiplex the TDA and the TDB to be applied, and convert the signal of the corresponding TTL level into the signal level converter 43. To the mode selector 44 by converting the TTL level signal applied from the muxing control unit 42 and the TTL level signal applied from the muxing control unit 42 into a signal of the RS232C level. A signal level converting unit 43 for converting an RS232C level signal into a TTL level signal and applying it to the control boards 10a and 10b and a data terminal equipment (DTE) or DCE (Data) according to the direction in which the jumper stick is inserted. Communication equipment mode It further comprises a mode selection section 44 to select.

The connector 51 provided on the back board 50 applies an RS232C level signal applied from an operator terminal connected to the signal level converting unit 43 through the mode selecting unit 44 and selects the mode. The conversion signal applied through the section 44 is transmitted to the operator terminal.

The operation of the input / output port redundancy and mode selection device of the all-electronic exchange having the above configuration will be described as follows.

If the A side control board 10a is called the active side and the B side control board 10b is the inactive side, and the A side control board 10a attempts to send a message to the terminal of the external operator, the A first. The input / output transmission unit 11a of the side control board 10a applies the TDA to the port switching connection board 40 via the cable via the back board 20 and the cable connection unit 30.

At this time, the port switching control unit 41 of the port switching access board 40 generates a CTS for selecting the TDA applied from the input / output transmission unit 11a to mux the port switching access board 40. When applied to the control unit 42, the muxing control unit 42 selects the path of the A-side control board (10a) according to the CTS applied from the port switching control unit 41, and from the input-output transmission unit (11a) The applied TDA is multiplexed to apply the multiplexed signal having the TTL level to the signal level converter 43 of the port switching access board 40.

Accordingly, the signal level converting unit 43 level converts the multiplexed signal applied from the muxing control unit 42 and applies the corresponding converted signal of the RS232C level to the mode selection unit 44 of the port switching connection board 40. The mode selector 44 including a jumper stick selects the DTE or DCE mode according to the direction in which the jumper stick is inserted, and selects the converted signal applied from the signal level converter 43 to the back board 50. Is applied to the connector 51.

Accordingly, the connector 51 transmits the converted signal applied through the mode selector 44 to the connected operator terminal.

On the other hand, if a message is applied from the operator terminal connected to the connector 51, the mode selector 44 selects the DTE or DCE mode and receives the RS232C level signal applied through the connector 51. The signal is applied to the signal level converter 43.

Accordingly, the signal level converting unit 43 converts the RS232C level signal applied through the mode selector 44 to convert the RTL and the RDB, which are signals of the TTL level, through the cable connection unit 30 to the back board ( 20 are respectively applied to the A side control board 10a and the B side control board 10b, and the B side control board 10b on the inactive side does not perform an operation and the A side control board on the active side. Only 10a performs an operation, and the input / output transmitter 11b receives the RDA applied from the signal level converter 43.

However, in the conventional input / output port redundancy and mode selection device, as described above, a plurality of cables of the separate cable connection unit 30 and the port switching connection board 40 which are unified are necessary, so that the volume of the structure of the system occupies Not only is large, but the cost is increased, even when one of the plurality of cables is disconnected, that is, even when the active side is normal when the cable connected to the active side of the control boards 10a and 10b is detached. Normal message can be input and output only when the switch is inactive, and even if a functional error occurs in the port switching access board 40, the entire system can be directly induced.

In addition, a jumper stick of the mode selector 44 capable of selecting a DTE or DCE mode is placed in the port switching access board 40 so that the operator must move the jumper stick at the time of selecting the corresponding DTE or DCE mode. Mode switching during operation may be accompanied by a functional failure due to the power-off of the port switching connection board 40. That is, when the mode selection unit 44 selects a mode, the power of the port switching connection board 40 must be turned off according to the insertion direction of the jumper stick provided in the port switching connection board 40. As a result, the I / O function of the system should be interrupted while the power is off.

As such, in the related art, multiple cables and a separate unified port switching access board are necessary, thereby increasing the volume and cost of the system, as well as functional errors of the cable sheathing and the port switching access board. In addition, when the mode is selected, the corresponding port switching connection board must be powered off, which causes a problem in that the input / output function of the system is interrupted.

In order to solve the inconvenience described above, the present invention implements a separate I / O port switching connection board and a plurality of cables in the I / O control board in the electronic switchboard, so that the mode can be selected without a power off without using a jumper stick. It is an object of the present invention to provide an input / output port redundancy and mode selection device of an electronic switching system that simplifies the structure of the system so that there is no fear of an error caused by cable hernia because there is no cable.

The present invention for achieving the above object is provided with a redundant structure of the A-side control board and the B-side control board, driving one side of the duplication to the active side to convert the TTL level transmission data into RS232C level data And a control board for converting the data of the applied RS232C level into the received data of the TTL level; It is equipped with a DCE mode connector to drive when the DCE mode is selected and a DTE mode connector to drive when the DTE mode is selected according to the mode selection required for system operation. It transmits to the terminal of, and receives the RS232C level data from the terminal of the operator, characterized in that it comprises a back board applied to the control board. The control board may further include an input / output transmitter configured to respectively apply TTL level transmission data related to operation and maintenance of the exchange and to receive received RS232C level received data, respectively; A port switching controller which checks whether an active side or an inactive side is generated, and generates and applies an active control signal or an inactive control signal, respectively; Drives by an active control signal applied from the port switching controller and is driven by an inactive control signal applied from the port switching controller to convert TTL level transmission data applied from the input / output transmission unit into RS232C level data. And a signal level converting unit applied to the back board and converting data of the RS232C level applied from the back board into the received data of the TTL level and applied to the input / output transmission unit, respectively.

1 is a block diagram illustrating an input / output port redundancy and mode selection device of a general electronic switch.

Figure 2 is a block diagram showing the input and output port redundancy and mode selection device of the electronic switch according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

60a, 60b: control board 70: back board

61a, 61b: input / output transmitter 62a, 62b: port switching controller

63a, 63b: signal level converter 71: DCE mode connector

72: DTE mode connector

Input and output port redundancy and mode selection device of the electronic switch according to an embodiment of the present invention, as shown in Figure 2, comprises a redundant control board 60, and a back board 70.

The control board 60 is composed of a redundant A side control board 60a and a B side control board 60b. When one side is driven to the active side, the other side is controlled to the inactive side to transmit TTL level transmission data (TDA). , Converts TDB into RS232C level data and applies it to the back board 70 and converts RS232C level data applied through the back board 70 into TTL level received data (RDA, RDB). .

The back board 70 includes a DCE mode connector 71 and a DTE mode connector 72. The back board 70 drives the corresponding DCE mode connector 71 when the DCE mode is selected according to the selection of a mode required for system operation. When the mode is selected, the DTE mode connector 72 is driven to transmit the RS232C level data applied from the active side of the control board 60 to the operator's terminal, and receives the RS232C level data from the operator's terminal. Applied to the control board 60.

Each of the control boards 60a and 60b applies the TTL level transmission data TDA and TDB related to the operation and maintenance of the exchange to the signal level converters 63a and 63b, respectively. Input / output transmitters 61a and 61b for receiving RS232C level received data (RDA, RDB), which are signal level converted from 63a and 63b, respectively, and whether the active side or the inactive side in the system operation are checked and the corresponding control is performed. If the boards 60a and 60b are active, generate an active control signal ACS and apply them to the corresponding signal level converters 63a and 63b or if the control boards 60a and 60b are inactive, the inactive control signals ICS. Is generated and driven by the port switching controllers 62a and 62b to be applied to the signal level converters 63a and 63b and the active control signals ACS applied from the respective port switching controllers 62a and 62b. Applied from the respective input / output transmission units 61a and 61b TTL level transmission data (TDA, TDB) of the signal level conversion to the data of the RS232C level is applied to the back board 70 and the RS232C level data applied from the back board 70 receives the TTL level The signal level is converted into data RDA and RDB and applied to the input / output transmission units 61a and 61b, respectively, and is driven by the inactive control signal ICS applied from the corresponding port switching controllers 62a and 62b. Signal level converters 63a and 63b for blocking TTL level transmission data TDA and TDB applied from the transmitters 61a and 61b or RS232C level data applied from the back board 70 are further included. Is done.

The operation of the input / output port redundancy and mode selection device of the electronic switch according to the embodiment of the present invention will be described in detail as follows.

The message is transmitted by the active side of the redundant I / O control board. In the redundant control board 60, as shown in FIG. 2, when one side performs the active side, the other side controls the standby side to the inactive side. .

If the A side control board 60a of the control board 60 is called the active side and the B side control board 60b is inactive, the message can be transmitted by the A side control board 60a. When a message related to operation and maintenance of the exchange is to be transmitted to a terminal of an external operator, the input / output transmitter 61a of the control board 60a of the A side first transmits a TTL level transmission data (TDA) including the message to be transmitted. It applies to the signal level conversion part 63a of the said A side control board 60a.

In addition, the port switching controller 62a of the A-side control board 60a transmits an active control signal (ACS) that enables the A-side signal level converter 63a to be driven only when the A-side control board 60a is active. Is applied to the side signal level converting section 63a.

On the other hand, the port switching controller 62b of the B-side control board 60b on the inactive side stops the driving of the signal level converter 63b of the B-side control board 60b. Since the ACS (Inactive Control Signal) is applied to the corresponding B side signal level converting unit 63b, the corresponding B side signal level converting unit 63b is maintained in a non-driven state so as not to affect the back board 70 at all. do.

However, the A side signal level converting section 63a transmits TTL level transmission data TDA applied from the input / output transmitting section 61a by an active control signal ACS applied from the A side port switching control section 62a. Level conversion) to apply the converted data of the RS232C level to the back board 70.

Accordingly, the back board 70 transmits data of the RS232C level applied from the A side signal level converter 63a to a terminal of a connected operator according to selection of a mode required for system operation. The back board 70 DCE mode connector 71 transmits RS232C level data applied from the A side signal level converting unit 63a to the operator's terminal when the DCE mode is selected during system operation, and the DTE of the back board 70. The mode connector 72 transmits data of the RS232C level applied from the A side signal level converter 63a to the operator's terminal when the DTE mode is selected during system operation.

At this time, if the need to change the mode during the operation of the system, conventionally had to turn off the board using a jumper stick, in the present invention can be changed by changing only the position of the two connectors (71, 72) without the jumper stick There is no problem that the function of I / O is interrupted.

In contrast to the above, when the RS232C level data applied from the DCE mode connector 71 or the operator terminal connected to the DTE mode connector 72 is applied to the back board 70, the DCE mode connector 71 is applied. Alternatively, the DTE mode connector 72 applies RS232C level data applied from the corresponding operator terminal to the signal level converting units 63a and 63b.

Accordingly, the B-side signal level converter 63b is not driven by the inactive control signal ACS applied from the B-side port switching controller 62b, and thus does not perform operation damage. Since 63a is driven by an active control signal (ACS) applied from the A side port switching controller 62a, the T232 data of the RS232C level applied from the DCE mode connector 71 or the DTE mode connector 72 is TTL. Level conversion is performed to the received data TRA of the level and applied to the A side input / output transmission unit 61a.

In brief description of the above, it eliminates a plurality of cables used in the prior art and a separate port switching connection board which is not duplicated, and allows only the active side to transmit and receive within the redundant control boards 60a and 60b. By the control signals ACS and ICS of the port switching controllers 62a and 62b, the signal level converters 63a and 63b transmit and / or block a message, thereby allowing a simple redundancy function of the input / output port.

Therefore, in the prior art, a system error due to cable sheathing and a switchover to the active side do not occur when the cable is sheathed, and due to a malfunction of the conventional port switching connection board which has been neutralized or a power off required at the time of mode switching This can be done by resolving the disadvantage that the I / O function of the system is stopped. In particular, the DCE / DTE mode connectors 71 and 72 are dedicated to DTE mode on one side of the control boards 60a and 60b of redundant input and output, and to DCE mode on the other side. The stick can be removed.

As described above, according to the present invention, a separate input / output port switching connection board and a plurality of cables are removed from the electronic switchboard, and the signal level conversion unit is transmitted according to the control signal of the port switching controller in the redundant input / output control board. By level converting and transmitting data through the selected dedicated DCE / DTE mode connector of the back board, the system can be selected without power-off without using a jumper stick, and there is no cable, so there is no fear of errors caused by cable hernia. Simplify the structure to bring stability and cost reduction of the system.

Claims (2)

In the input / output port redundancy and mode selection device of the electronic switching system, the redundancy structure of the A side control board 60a and the B side control board 60b is provided, and one side of the redundancy is driven to the active side to achieve the TTL level. A control board 60 for converting the transmission data TDA and TDB into RS232C level data and converting the applied RS232C level data into TTL level reception data RDA and RDB; The active side of the control board 60 is provided with a DCE mode connector 71 for driving when the DCE mode is selected and a DTE mode connector 72 for driving when the DTE mode is selected according to the selection of a mode required for system operation. Transmitting the RS232C level data from the terminal of the operator, and receives the RS232C level data from the terminal of the operator to apply to the control board 60, characterized in that it comprises a back board 70 I / O port redundancy and mode selector of electronic exchange. The control board (60a, 60b) of claim 1, wherein each of the control board (60a, 60b) is applied to the TTL level transmission data (TDA, TDB) related to the operation and maintenance of the exchange, respectively, and receives the received data (RDA, RDB) of the RS232C level applied. Input and output transmitters 61a and 61b respectively receiving; Port switching controllers 62a and 62b for checking the active side or the inactive side to generate and apply an active control signal ACS or an inactive control signal ICS, respectively; Drive by the active control signal (ACS) applied from the port switching control unit (62a, 62b) and driven by the inactive control signal (ICS) applied from the port switching control unit (62a, 62b) and the input / output transmission unit ( Transmit data (TDA, TDB) of TTL level applied from 61a, 61b to RS232C level data to be applied to the back board 70 and RS232C level data applied from the back board 70 to the TTL. And signal level converters 63a and 63b, which are converted to receive data RDA and RDB at the level and applied to the input / output transmitters 61a and 61b, respectively. Mode selector.